||WIND ESTIMATE (MPH)
Some damage to chimneys; branches broken off trees;
shallow-rooted trees pushed over; sign boards damaged.
Peels surface off roofs; mobile homes pushed off
foundations or overturned; moving autos blown off roads.
Roofs torn off frame houses; mobile homes demolished; boxcars
overturned; large trees snapped or uprooted; light-object missiles
generated; cars lifted off ground.
Roofs and some walls torn off well-constructed houses; trains
overturned; most trees in forest uprooted; heavy cars lifted off
the ground and thrown.
Well-constructed houses leveled; structures with weak foundations
blown away some distance; cars thrown and large missiles generated.
Strong frame houses leveled off foundations and swept away;
automobile-sized missiles fly through the air in excess of 100
meters (109 yds); trees debarked; incredible phenomena will occur.